IRADS is the name of the reporting method, derived from the initials of "Breast Imaging Reporting and Data Systems." This method aims to standardize mammography and other breast radiology reports to a level that everyone can easily understand and agree on, and to provide guidance on what to do next based on the category specified in the report results.

Category 0: Additional imaging methods are needed (cases in which a definitive conclusion cannot be reached with a single method)

Category 1: Normal mammogram (examination that does not detect cancer)

Category 2: Benign findings (examination that contains definitive benign findings, such as cysts)

Category 3: Probably benign findings (cases with a maximum 2% probability of cancer underlying the findings)

Category 4: Suspicious findings (group containing findings with a 2-95% probability of cancer)

4A: Mildly suspicious (2-10% probability of malignancy)

4B: Moderately suspicious (10-50% probability of malignancy)

4C: Highly suspicious (50-95% probability of malignancy)

Category 5: Findings that strongly suggest malignancy (including findings with a 95-99% probability of malignancy) (Category 6: Cases known to be malignant (verified by biopsy) but not yet treated definitively